Yeah, well changing what you practice is very important, it gets the player motivated with fresh stuff. Not only this, but sometimes you need a brake from scale exercises, so you do some chords as a "rest" in the session. Then you continue with the "hard work"

Well it sounds like a nice practice plan. Making your goals list is very important and also picking doable goals is important too - to motivate you and lead you step by step in your progress. Maybe you can try practicing that way for a month to see how it works for you.

There is nothing wrong with changing your practice routine from time to time, actually it is a good thing. If you only focus on one thing you will get fed up with practicing it after a while, it is better to switch to a different topic, and return with a fresh mind later.